Tank truck filling plug



Dec. l1, 1934. G. H. CLAY ET AL TANK TRUCK FILLING PLUG Filed Oct. 22, 1952 Gttornegg Patented Dec. 11, 19.34' y n y e UNITED STATES PATENT OFFICE TANK TRUCKy FILLING PLUG George H. Clay and Harry W. Bailey,

Kansas City, Mo.

Application October 22, 1932,/ Serial No. 639,071

1 Claim. (Cl. 220-24) This invention relates to tank truck plugs and neck 3 `ofFigure 4 are provided with' a series of the primary object of the invention is to produce internal inclinedl lockingr Cam ribs 6. a plug which can be quickly applied in or with- The ring 5 at its upper` end is formed with drawn from operative position, as compared with an outwardly extending annular iiange 7 overly- 5 the conventional screw plug which must be ing and applying pressureon a gasket k8 carried 5 turned around several times to` secure it in or by the top edge of the filling neck 3 to seal the remove it from operative position, means being' parts against vapor loss. also provided to make the plug adapted for use The filling neck 3 of Figure 4, orthe ring 5, with the standard threaded plug openings now in as the case may be, is not only provided with 1o common use. the internal clamp ribs 6, but is also provided 10` Another object is to provide a quick opening with stop ribs 9 and 10, the former being displug with a gravity operated ball valve having a posed adjacent the lower part of the cam ribs double seat, the ball in its normal position holdand the latter being spaced from the cam ribs ing the tank sealed against vapor loss, but beingv at the tops thereof where the cam surfaces are l5 adapted to be unseated on the developmentk of highest. 15l

internal pressure appreciably above that of the For closing the opening of the neck, a plug is atmosphere. Also, should the tank overturn employed which is constructed as follows: 11 is from a wreck or the like, the ball unseats from its a cap having a depending circular boss 12 fitting normal position and seats on the other valve seat snugly inthe neck or ring above ribs 6 thereof,

to prevent loss of the contents of the tank. and encircling said boss 12 is a gasket 13 to be 20 A further object of the invention is to produce clamped bythe cap down on the upper end of a valve mechanism which opens to admit air into the flange '7 or upon the top of the filling neck 3 the tank should a vacuous or low pressure condiin the type of construction shown in Figure 4. tion develop therein. The cap has opposite depending hooks 14 whose With the general objects named in view and terminals underlie and are spaced from the boss 25 others as will hereinafter appear, the invention 12 a distance slightly greater than the depth consists in certain novel and useful features of of the ribs 6, which hooks, when the cap is free construction and organization of parts as hereinto uncover the neck opening, stand in the space after described, and in order that it may be fully between the ribs 6 and the respective stops 10.

understood reference is to be had to the accom- The cap has outwardly projecting handles 15 30 panying drawing, in whichzwhereby it may be turned to cause the hooks Figure 1 is a top plan view of a fragment of a to engage the ribs 6 or to withdraw from such standard tank for the storage or conveyance of engagement, and by which the lid or cap can be gasoline and the like, equipped with a plug conconveniently swung to or from position over the a5 struction embodying the invention mounted in neck of the tank. 35 the usual threaded neck Opening. To provide for such movement, the cap has Figure 2 is an inverted planfview of the plug an upstanding cylindrical extension 16 encircled construction. by a collar 17, and the latter has an arm 19 Figure 3 is a vertical section on the line terminating in a horizontal sleeve 20 tting be- 4,0 III- III of Figure 1. tween a pair of ears 21 formed on or secured 40 Figure 4 iS e VieW Similar 'G0 Figure 3, but with to the neck or ring, a pivot 22 hingedly connectthe plug in elevation and rotatably rinterlocked ing the arm and the ears. It will be apparent with the neck of the tank dome instead of with from the foregoing that the cap can be swung a ring screwed into the neck 0f the dome as proon the hinge connection to or from a position vided for in the preceding figures. on the neck or ring to close or give access to the 45 Figure 5 is a perspective view of a fragment of tank, and that the cap is adapted for swivel or the cap disposed in inverted position. rotative movement with respect to the collar, and Figure 6 is a modified type of dome constructhat the hinge point of the latter is so located tion. that the hooks of the cap when the latter is in Referring t0 the drawing in detail, 1 is a truck c1osed position, but not locked, are tting be- 50 tank provided with a dome 2 having a circular tween the stops 10 and the ribs 6, and hence top opening surrounded by an upstanding cylincan be turned only toward the latter. When so drical neck 3 which is internally threaded as at 4 turned, the lugs engage the ribs and as there is in Figures 1 to 3 inclusive. Threaded into said a cam relation between them, the cap is forced opening is a ring 5. The ring 5 and the tank downward and hence clamps its gasket 13 firmly 55 upon the neck or ring to seal the tank against vapor loss. Reversed rotation of the cap` is arrested when the hooks abut the stops 10, at which time the cap can be swung to open position.

The cap has a central opening or passageway 23 and a hood 24 fits over said opening at its top, and interposed between the cap and hood and held in position by the hood securing screws 25, is a re screen 26. A passageway is thus provided to permit air to enter the tank upon the production of a vacuous condition therein as will hereinafter appear.

The cap is provided with a valve mechanism to relieve vacuous conditions within the tank, to relieve pressure conditions within the tank, and to seal the tank against leakage or loss of liquid should the tank be accidentally overturned as in a wreck or the like. This mechanism comprises the following elements: 27 and 28 respectively indicate upper and lower members detachably secured together, the upper member having an opening 29` and the lower member an opening 30. Receivedwithin the cage or housing formed by the members 27 and 28 is a ball valve 3l normally closing the opening 30 to prevent vapor loss from the tank, butv unseated by vapor pressure should the pressure within the tank exceed atmospheric pressure.

If the tank should be upset or overturned the ball valve will gravitate to its seat 29 to seal the tank against loss of its liquid contents.

To provide means to relieve vacuous conditions within the tank the ball valve casing is formed at its upper end with a ange 32 and at its lower end with a valve seat 33 adapted to be seated on a Valve seat 34 formed on the lower end of a sleeve 35 threaded in the passageway in the cap, said seats 33-34 being held in closed relation by a coiled spring 36 engaging the ange 32 at one end and a series of bosses 37 formed on the' inner wall of the sleeve 35. Upon vacuous conditions within the tank the valve opens against the resistance of the spring 36 to admit air into the tank.

From the above description, it will be apparent that We have produced a construction embodying all of the features of advantage set forth as desirable, and while we have described the preferred embodiments of the invention, we reserve the right to all changes within the spirit of the invention and without the ambit of the prior art.

In Figure 6 a modied type of dome and neck is illustrated, in which the filling neck is formed by a down turned ilange 38 integral with the body of the dome, the locking ribs 6 of the other constructions being formed by inclined notches 39 cut in ther periphery of the lower edge of the flange as shown. The operation of the construction shown by said Figure 6 is the same as that previously described.

We claim:-

The combination with a tank having a filling neck, a collar hingedly connected to the tank, a cap for the filling neck larger than and underlying the collar and provided with an upstanding tubular portion swivelled in the collar, the cap and neck having a bayonet wedge-joint connection for the clamping of the former upon the latter, and a hood tting over and secured to the :1L

upper end of the tubular portion of the cap and provided with a depending skirt overlying the said collar to prevent accidental disengagement between the cap and the collar when the latter is operated to withdraw the cap from the neck of the tank.

GEORGE H. CLAY. HARRY W. BAILEY, 

